The Multiquip EM509329 HHC Screw 3/4-10X6 is a genuine OEM fastener designed for Mayco concrete pump models C30HDNI, C30HDNI Precision, C30HDNI Zenith, C30HDN, C30HDG, C30HDGA, and C30HDZ. Sourced directly from Multiquip, this screw meets the exact dimensional and material standards specified for these heavy-duty concrete pumping units. Purchasing the correct OEM hardware ensures the fastener seats and torques properly in its application without the guesswork that comes with generic hardware substitutes. DHS Equipment stocks this part to help keep your C30-series pump running with every component secured as intended.
Key Features
- Genuine OEM Hardware Grade — Manufactured to Multiquip's exact thread pitch, length, and head specification for the 3/4-10X6 application, ensuring correct clamping force and torque retention on concrete pump assemblies.
- Direct OEM Replacement — Installs exactly as the original fastener, with matching 3/4-10 coarse thread profile and 6-inch length for a drop-in swap with no modifications to hardware or mating components.
- Broad C30-Series Compatibility — Confirmed fitment across C30HDNI, C30HDNI Precision, C30HDNI Zenith, C30HDN, C30HDG, C30HDGA, and C30HDZ Mayco concrete pump models.
- Structural Integrity Where It Counts — On a high-cycle concrete pump, a fastener of the correct grade and geometry maintains critical joint integrity under continuous vibration and pressure — preventing loosening, misalignment, or component separation during operation.
- Verified Part Number — Order with confidence using Multiquip part number EM509329 to confirm you are receiving the exact screw specified for your C30-series unit.
A hex head cap (HHC) screw is a structural fastener used to secure major components and housings on heavy equipment. On concrete pumps like the C30-series, these fasteners hold together critical assemblies that are subject to constant vibration, pressure cycling, and mechanical stress. Using a fastener of the wrong thread pitch, length, or material grade can result in under-torquing, thread stripping, or joint failure — any of which can cause component movement or equipment damage during pumping operations. Replacing worn or damaged hardware with the correct OEM-spec screw restores the mechanical integrity the pump was engineered to deliver.
Part Details
| Part Number | EM509329 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | HHC Screw 3/4-10X6 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | C30HDNI |
| Mayco Pumps | C30HDNI Precision |
| Mayco Pumps | C30HDN |
| Mayco Pumps | C30HDNI Zenith |
| Mayco Pumps | C30HDG |
| Mayco Pumps | C30HDZ |
| Mayco Pumps | C30HDGA |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
